I always try to be positive, even in difficult moments.
解释：向外物游览就要要求外物的完备，向自己内心求取，则能充实完善自身。
When I look at the world I'm pessimistic, but when I look at people I am optimistic.
The truth is rarely pure and never simple.
When a professor insists computer science is X but not Y, have compassion for his graduate students.
当教授坚持说计算机科学是X但不是Y时，请对他的研究生抱有同情心。
制药行业必须在利润与使命之间取得平衡——我们的使命是治愈，而不仅仅是销售。